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Quantum-symmetric equivalence is a graded Morita invariant
Abstract
We show that if two m m -homogeneous algebras have equivalent graded module categories, then they are quantum-symmetrically equivalent, that is, there is a monoidal equivalence between the categories of comodules for their associated universal quantum groups (in the sense of Manin) which sends one algebra to the other. As a consequence, any Zhang twist of an m m -homogeneous algebra is a 2-cocycle twist by some 2-cocycle from its Manin’s universal quantum group.
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